<template>
  <div class="login_container">
   <div class="login_box">
    <!-- 头像区域 -->
    <div class="avater_box">
      <img src="../assets/logo.png" alt="">
    </div>
    <!-- 登录表单区域 -->
    <el-form ref="loginFromRef" :model="loginFrom" :rules="loginFromRules" label-width="0px" class="login_from" :v-model="loginFrom">
      <!-- 用户名 -->
    <el-form-item prop="username">
    <el-input v-model="loginFrom.username" prefix-icon="el-icon-user-solid"

    ></el-input>
    </el-form-item>
    <!-- 密码 -->
    <el-form-item prop="password">
    <el-input v-model="loginFrom.password" prefix-icon="el-icon-lock"

     type="password" ></el-input>
    </el-form-item>
<!-- 按钮区域 -->
<el-form-item class="btns">
   <el-button type="primary" @click="login">登录</el-button>
    <el-button type="info" @click="resetLoginFrom">重置</el-button>
</el-form-item>

    </el-form>
   </div>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 这是登录表单的数据绑定对象
      loginFrom: {
        username: 'admin',
        password: '123456'

      },
      // 表单的验证规则对象
      loginFromRules: {
        // 验证用户名是否合法
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        // 验证密码是否合法
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }

    }
  },
  methods: {
    // 点击重置按钮，重置登录表单
    resetLoginFrom () {
      this.$refs.loginFromRef.resetFields()
    },
    login () {
      this.$refs.loginFromRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('login', this.loginFrom)
        if (res.meta.status !== 200) return this.$Message.error('登录失败')
        this.$Message.success('登录成功')
        // 1.将登录成功之后的token 保存到客户端的 sessionStorage中
        // 1.1 项目中除了登录之外的其他api接口，必须在登录之后才能访问
        // 1.2 token 只应用在当前网站打开期间生效，路由地址是/home
        window.sessionStorage.setItem('token', res.data.token)
        this.$router.push('/home')
      })
    }

  }

}
</script>

<style lang="less" scoped>
.login_container{
  background-color: #2b4b6b;
  height: 100%;
}
.login_box{
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform:translate(-50%,-50%) ;
  .avater_box{
    height: 130px;
    width: 130px;
    border:1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%,-50%);
    img{height: 100%;
    width: 100%;
    border-radius: 50%;
    }
  }
}

.btns{
  display: flex;
  justify-content: flex-end;
}
.login_from{
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
</style>
